Machine for troweling



Dec. 14, r1937. H. s. BULTON MACHIYNE FOR TROWELING Filed Deo. 28, 1936 Hamzdawzfmf Patented Dec.` 14, 1937 umTElz STATES PATENT fol-FICE MACHINE FOR TROWELING Harold S. Boulton, Chicago, Ill.

Application December 28, 1936, Serial No. 117,842

4 Claims. (Cl. iii-45) My invention relates to mechanical means for trowellng cementitious bodies, particularly iloors, and is a modlication of or variation in the construction shown in my copending application 5 Serial No. 29,901, iiled July5, 1935, Patent No.

An object of my invention is to provide a troweling device in which some of the objections to the solid plate are overcome. For example, the

matter of suction and that of uneven wear, due to the progressively greater extent of travel of the outer portion oi the disc ascompared to the inner portion. By breaking up the disc into a plurality of separate plates or segments and' Fig. 3 is a sectional view on the line 3-3 of Fig. 2; and,

Fig. 4 is a bottom plan view.

3o In the drawing I have illustrated a motor frame 'and motor Il, having a guide handle II. To the motor driven shaft I2 is connected, by means of bolts I3 and, preferably through a resilient liner Il. a drive plate It. Mounted beneath the drive 35 plate are a plurality of troweling plates I0, eight being shown in this instance. The edges oi' the plates are bevelled or turnedl up. as preferred. in order to oder no resistance to rotation on the relatively sott cement on which the plates will 40 operate. Leaf springs I1 are secured to the upper faces o! the plates. and bolts Il, passing through suitable openings in the plate I8 and engaging the spring Il, serve as means for resilient attachment o! the plates or trowels to the drive plate. 45 It will be noted that each trcwel plate has two points ol' attachment and that the plates may be reversed: that is. turned end for end, ii and 'when wear makes such reversal desirable. It

will be understood that the extent of travel of the outer portions of the plates will be greater Vthan the inner portions and thatthere willbe a tendency for proportionately greater wear on the outer portions. This may be compensated by 5 occasional end to end reversal of the plates. 'I'his is accomplished by forming the trowels symmetrical about their yfastening bolts I8, thus enabling them to be reversed in position.

The number and disposition of the trowel plates 10 is a matter of selection, a larger or smaller number than those shown being possible. The form of the spring connection between the trowels and the drive plate may also be changed and in other manners the construction is capable of modical5 tionwithin the skill of the mechanic.

I claim:

l. In a troweling machine, the combination of a horizontally rotatable carrier, a plurality of separate angularly arranged trowels mounted beneath said carrier, and a motor mounted vertically abovethe center of said carrier and connected to rotate the carrier and the trowels in a plane.

2. In a troweling machine, the combination of la horizontally rotatable carrier, a plurality of separate, angularly arranged trowels mounted beneath said carrier, with capacity for reversal of mounting, and a motor mounted vertically above the center of said carrier and connected to rotate the carrier and trowels in a plane. 3. In a troweling machine, the combination oi' a rotatable carrier, a plurality of separate trowels mounted beneath said carrier, a motor superimposed on the carrier and adapted to rotate the same and the trowels in a horizontal plana-and spring means interposed between the trowels and the carrier. 4. In a troweling machine, the combination of a rotatable carrier, a plurality oi separate trow- 4o els mounted beneath said carrier, and symmetrically formed about their mounting attachments, thereby providing capacity for reversal of mounting. and a motor superimposed on the carrier and adapted to rotate the same and the trowels in a horizontal plane.

HARQLD B. BOULTON. 

